Demography is the statistical study of human populations. It includes the study of the size, structure, and distributions of different populations and changes in them in response to birth, migration, aging, and death. It also includes the analysis of the relationships between economic, social, cultural, and biological process influencing a population.
Examples of topics studied include trends in population growth and how it is shaped by the components of fertility, mortality, and migration
Demography is widely used for various purposes and can encompass small, targeted populations or mass populations. Governments use demography for political observations, scientists use demography for research purposes, and businesses use demography for the purpose of advertising.
Actuarial science refers to the unique blend of several different fields of study; it serves the purpose of providing quantifiable guidelines for business decisions involving risk evaluation.
I think in aging society, demography will be more important for government.
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